The most easily polluted ground reservoirs are

From an archived question I looked up for you, I believe it should be water-table aquifers. By the way, if you look in the link above, replace the 4449929 with 482974 to see the answer to it!

Answer(12) judaism; ans(11) all of the above; //ans(10) islands that are artificially created; //ans(9) people accept that the caste system keeps order in society and prevent chaos; ///ans(8),brahman; ans(7) the sikhns; ///ans(6); the non-cooperation movement; asn(5)sporadically grant congressional requests; /ans(4) all of the above; ///ans(3) true; //ans(2) true; //ans(1) false;

The answer is    d.  central highlands